Compléter The Universe and our Solar SystemVersion en ligne Actividad en inglés, para completar huecos con palabras, sobre el Universo y los planetas de nuestro Sistema Solar. Dirigida al alumnado de 2º ESO, de Física y Química, en la unidad didáctica sobre las fuerzas y el Universo. par Amparo Soria 1 THE UNIVERSE The universe describes space and all of the , , , and other matter contained there . It is so big that some scientists believe that it might go on forever . Galaxy : a very large group of and . Our galaxy is the Star : a ball of in space that gives off light . Sun : any star that is the of a system of planets . Solar System : the sun and the bodies that move in orbit around it . Light year : is the that light travels in a year . Planet : a large body that does not off light . OUR SOLAR SYSTEM : INNER PLANETS , , , and . The sun is an average size star and the centre of our . One of the things surrounding it is an , and the four inside that belt are called the . OUR SOLAR SYSTEM : OUTER PLANETS , , , and are the outer planets of our solar system . There is a planet called Pluto out there , too !